20120822011 has 4 divisors (see below), whose sum is σ = 20121107224. Its totient is φ = 20120536800.

The previous prime is 20120821997. The next prime is 20120822017. The reversal of 20120822011 is 11022802102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20120822011 - 2⁷ = 20120821883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20120822011.

It is not an unprimeable number, because it can be changed into a prime (20120822017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49276 + ... + 206566.

It is an arithmetic number, because the mean of its divisors is an integer number (5030276806).

Almost surely, 2^20120822011 is an apocalyptic number.

20120822011 is a deficient number, since it is larger than the sum of its proper divisors (285213).

20120822011 is a wasteful number, since it uses less digits than its factorization.

20120822011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285212.

The product of its (nonzero) digits is 128, while the sum is 19.

The spelling of 20120822011 in words is "twenty billion, one hundred twenty million, eight hundred twenty-two thousand, eleven".